Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Investigation of Thermo-mechanical Characteristics for Remanufacturing of a ATC Part using a DED Process

DED 공정을 이용한 ATC 부품의 재제조를 위한 열-기계 특성 고찰

  • K. K. Lee ;
  • D. G. Ahn (School of Mechanical Engineering, Chosun University)
  • 이광규 (조선대학교 기계공학과) ;
  • 안동규 (조선대학교 기계공학과)
  • Received : 2024.07.22
  • Accepted : 2024.07.25
  • Published : 2024.08.01
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Abstract

Interest in remanufacturing of part has significantly increased to reduce used material and energy together. The directed energy deposition (DED) process has widely applied to remanufacturing of the part. An excessive residual stress takes place in the vicinity of the deposited region by the DED process due to rapid heating and rapid cooling (RHRC) phenomenon. The excessive residual stress decreases the reliability of the remanufactured part. Therefore, thermo-mechanical analysis for the remanufacturing of the part is needed to investigate heat transfer and residual stress characteristics in the vicinity of the deposited region. The thermo-mechanical analysis of a large volume deposition is significantly difficult to perform due to the requirement of a long computation time and a large computer memory. The goal of this paper is to investigate thermo-mechanical characteristics for remanufacturing of the ATC part using a DED process. The methodology of the thermo-mechanical analysis for a large volume deposition is proposed. From the results of analysis, heat transfer and residual stress characteristics during deposition and cooling stages are investigated. In addition, the proper deposition strategy from the viewpoint of the residual stress is discussed.

Keywords

Acknowledgement

이 연구는 과학기술정보통신부의 재원으로 한국연구재단의 지원 (No.RS-2023-00219369) 및 산업통상자원부의 재원으로 한국에너지기술평가원의 지원(No.20206310200010) 을 받아 수행된 연구임.

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